Hi to all,
to start experimenting with py4web in Eclipse/PyDev on Debian Linux I did
the following.
Maybe someone will find it useful.
Debugging is not working yet for me, an advice would be welcome.
1) Set-up the virtual environment for web4py with libraries managed by pip
(to avoid mixing with system-wide python libraries installed by the Debian
packaging system):
sudo apt-get install virtualenvwrapper
pip3 install --user --upgrade virtualenvwrapper
mkvirtualenv -p /usr/bin/python3 /opt/python3env/py4web
cd /opt/python3env/py4web/bin
2) Install py4web by pip.
./pip3 install py4web
./python3 -c "from pydal.validators import CRYPT;
open('/opt/py4web/password.txt','w').write(str(CRYPT()(input('password:'))[0]))"
Test if it is working:
./py4web-start /opt/py4web -p /opt/py4web/password.txt
3) Create a new PyDev project for the whole py4web apps directory:
Start Eclipse, create a new PyDev project with the source directory /opt/py4web
Define the interpreter /opt/python3env/py4web/bin/python3 for the project;
in its definition at first add the system libraries:
/opt/python3env/py4web/lib/python3.7
/opt/python3env/py4web/lib/python3.7/lib-dynload
/opt/python3env/py4web/lib/python3.7/site-packages
As a result, PyDev complained: "It seems that the Python /Lib folder (which
contains the standard library) was not found /selected during the instal
process. This folder (which contains files such as threading.py and
traceback.py) is required for PyDev to function properly ...". To solve it,
at first I tried symlinking the mentioned files:
ln -s /usr/lib/python3.7/threading.py
/opt/python3env/py4web/lib/threading.py
ln -s /usr/lib/python3.7/traceback.py
/opt/python3env/py4web/lib/traceback.py
The complaint has disappeared and I have not noticed any other apparent
problems. However, to be sure that everything needed is available, later I
added the whole /usr/lib/python3.7 in libraries instead of the symlinked
files.
Because only system libraries are imported and not site-packages, hopefully
this second solution won't break the virtualenv separation from the system
environment.
4) Enable launching py4web from Eclipse:
Copy web4py starting script to the apps directory:
cp /opt/python3env/py4web/bin/py4web-start /opt/py4web/py4web-start.py
Define new run configuration for py4web-start.py with the arguments
"/opt/py4web
-p /opt/py4web/password.txt".
Now I can start py4web from Eclipse and read its output in the Eclipse
console.
5) PyDev Debugging:
However, for now, I got stuck in making the PyDev debugger working. It
complains:
pydev debugger: starting (pid: 27370)
Traceback (most recent call last):
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 728, in exec_module
File "<frozen importlib._bootstrap>", line 219, in
_call_with_frames_removed
File
"/opt/python3env/py4web/lib/python3.7/site-packages/py4web/__init__.py",
line 1, in <module>
from . core import (
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 152, in __exit__
File "<frozen importlib._bootstrap>", line 107, in release
RuntimeError: cannot release un-acquired lock
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 953, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 219, in
_call_with_frames_removed
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 152, in __exit__
File "<frozen importlib._bootstrap>", line 107, in release
RuntimeError: cannot release un-acquired lock
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File
"/home/zejdad/.p2/pool/plugins/org.python.pydev.core_7.4.0.201910251334/pysrc/pydevd.py",
line 3090, in <module>
main()
File
"/home/zejdad/.p2/pool/plugins/org.python.pydev.core_7.4.0.201910251334/pysrc/pydevd.py",
line 3083, in main
globals = debugger.run(setup['file'], None, None, is_module)
File
"/home/zejdad/.p2/pool/plugins/org.python.pydev.core_7.4.0.201910251334/pysrc/pydevd.py",
line 2154, in run
return self._exec(is_module, entry_point_fn, module_name, file,
globals, locals)
File
"/home/zejdad/.p2/pool/plugins/org.python.pydev.core_7.4.0.201910251334/pysrc/pydevd.py",
line 2161, in _exec
pydev_imports.execfile(file, globals, locals) # execute the script
File
"/home/zejdad/.p2/pool/plugins/org.python.pydev.core_7.4.0.201910251334/pysrc/_pydev_imps/_pydev_execfile.py",
line 25, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
File "/opt/py4web/py4web-start.py", line 3, in <module>
from py4web.core import main
File "<frozen importlib._bootstrap>", line 983, in _find_and_load
File "<frozen importlib._bootstrap>", line 152, in __exit__
File "<frozen importlib._bootstrap>", line 107, in release
RuntimeError: cannot release un-acquired lock
With regards,
David
--
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- http://github.com/web2py/web2py (Source code)
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